Stay-bolt construction



E. l. DODDS. sm BOLT comsmucnow. APPLICATION FILED JUNE 2,1921.

Patented May 3, W22.

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Y BOLT STAY-B011 1 CONSTB'UCTIONL narrate, original application filedJanuary as,

To all whom it may concern."

Be it knownthat T ETHAN citizen of the United of Pittsburgh, in thecounty of Allegheny and State of Pennsylvania, have invented certain newand useful Improvements in 1. Donna, at

Stay-Bolt Construction; and I do hereby will enable others skilled inthe art to which it a pertains to make and use the same.

yinvention relates to an improvement in staybolt construction and is adivision of application Serial Number 439,153 filed. by

me January 22nd, 1921. i

The object of he invention is to provide a bolt bearing member adaptedfor initial universal adjustment in the outer sheet of" the boiler, anda bolthaving a longitudinal movement in said bearing member, the lat terbeing secured against movement after-it has been initially adjusted sothat its axis will be parallel with the long axis of the bolt, and itconsists in the combination of parts as will be more fully described andpointed out in the claims.

The accompanying drawing is a view in a section of my improvement.

i 5 represents the outer sheet of a boiler 30 Y having an opening 6 forthe passage of the staybolt 7. j The outer portionot this opening isconcaved as shown at 8 to form a curved seat for-the bolt bearing member9, the body of which latter is semi-spherical and rests within saidcurved seat 8, and is adapted to be initially adjusted therein so thatits axis will be parallel withthe long axis of the bolt.

The bolt bearing member 9 is provided with a cylindrical bore which iscounterbored at its outer endto receive the cylindrie cal head 10 of thebolt 7, which head is seated on the shoulder 9 of the bearing member 9.The bolt is loosely mounted in the bearing member 9 and is free to movelongitudinally therein, and as the bearing member is initiallyadjustable, it will be apparent that the bolt and its hearing may beadjusted to any inclination within the limits required and the bolt befree to move longitudinallywithin the bearing member Specification ofLetters Patent.

1921 Serial No. 139,1513. Divided and this 2, 1921. Serial No, M4375.

tates, and a resident Patented May 23, T5922. application filed June andaccommodate itself to themovements of the boiler sheet-s to which it maybe con neoted.

The bearing member 9 and bolt head 10 are housed by the sleeve 11iwelded as at 12 to the outer sheet 5, and this sleeve is inj ternallythreaded at its outer end to be endeclare the followlng to be a full,clear, and exact description of the invention, such as gaged by theexternal threads on the cap 13, Whlch when 111 place, rests on theannular flange llon the sleeve 11 suflicient space being left betweenthe outer end of the head longitudinal movement of the bolt in thebearing member.

The cap 13 is removable for the ready inspection and replacement of thebolt.

lit is evident that changes may be made in the details of the partshence I would have it understood that I do not confine myself to thedetails as shown but consider myself at liberty to make such changes asmay fall within the scope of the invention.

Having fully described my invention what I claim as new and desire tosecure by Lettors-Patent, is: i i j 1. In a staybolt structure, thecombination of aboiler sheet having a bolt opening the wall of whichisconcave to form a seat for a bolt bearing member, a convex boltbearing member mounted in said seat and provided with a seat for a bolthead, a bolt the head of which is supported by and mounted to move insaid bearing member, a sleeve welded to the boiler sheet around the boltopening and a cap closing the outer end of said sleeve, the said boltbearing member being weldedto the sleeve.

2. In a staybolt structure, the combination ot a boiler sheet having abolt opening the wall of which is concave, a convex bolt bearing membermounted in said concave seat and provided with a cylindrical bore, a

being Welded to the sleeve.

In testimony whereof, I have signed 1111:; zlmon, m the presenceof :LHIIlJSH'lIHH L f ETHA N l. DODDS.

Witness EDWIN S. RYQE.

